The first presentation was given by Bitcoin Optech contributor Mike Schmidt, and focused on transaction fees and https://youtu.be/ ways to mitigate costs and user confusion. The number of attempts (hashes) per second is given by your mining equipment’s hashrate. Hashcash is the mining function used in bitcoin. 32. Hashcash stamps are 20bits, apr 2013 bitcoin was 55 bits and growing. Recently, there have been many articles that are down on Bitcoin. "I have a suspicion that Nakamoto had the notion that everyone could be a miner-that you could mine with nothing more than your laptop," said Farrokhnia. There were earlier ideas that are similar however as far as I could gather Nakamoto was not aware of B-money, and presumably not bit-gold either has he does not reference that in his paper.
Benvenuto!
